cff.cpp: Change padding of packed data to 8 bytes
cff.cpp: Change padding of packed data to 8 bytes

4 bytes of padding ain't enough to reliably detect end of data
before reading past the end of the packed_module buffer. If the
data runs out while processing an RLE code, up to 32 bits for
repeat_counter an two more code points (up to 16 bits each) will
be read before unpacking terminates.

adplug/adplug,adplug/adplug